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Antimicrobial Agents and Chemotherapy, March 2007, p. 1112-1114, Vol. 51, No. 3
0066-4804/07/$08.00+0 doi:10.1128/AAC.01347-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.
In Vitro Activity of the Oxazolidinone RWJ-416457 against Linezolid-Resistant and -Susceptible Staphylococci and Enterococci
David M. Livermore,*
Marina Warner,
Shazad Mushtaq,
Sarah North,
and
Neil Woodford
Antibiotic Resistance Monitoring and Reference Laboratory, Health Protection Agency Centre for Infections, 61 Colindale Avenue, London NW9 5EQ, United Kingdom
Received 27 October 2006/
Returned for modification 13 December 2006/
Accepted 24 December 2006
RWJ-416457, a novel oxazolidinone, had modal MICs of 0.5 to 1 µg/ml for linezolid-susceptible staphylococci and enterococci, versus linezolid MICs for these organisms of 1 or 2 µg/ml. RWJ-416457 MICs for mutants with 23S rRNA mutations were 2 to 32 µg/ml, versus linezolid MICs of 8 to 64 µg/ml; actual values reflected the proportion of gene copies mutated.
* Corresponding author. Mailing address: Antibiotic Resistance Monitoring and Reference Laboratory, Health Protection Agency Centre for Infections, 61 Colindale Avenue, London NW9 5EQ, United Kingdom. Phone: 44 (0) 20-8327-7223. Fax: 44 (0) 8327-6264. E-mail:
david.livermore{at}hpa.org.uk.
Published ahead of print on 8 January 2007.
Present address: Veterinary Laboratories Agency Weybridge, Technology Transfer Unit, New Haw, Addlestone, Surrey KT15 3NB, United Kingdom.
Antimicrobial Agents and Chemotherapy, March 2007, p. 1112-1114, Vol. 51, No. 3
0066-4804/07/$08.00+0 doi:10.1128/AAC.01347-06
Copyright © 2007, American Society for Microbiology. All Rights Reserved.
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